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    Akerib, D. S.; Akerlof, C. W.; Angelides, N.; Araújo, H. M.; Bai, X.; Boast, K. E.; Brás, P.; Buckley, J. H.; Bugaev, V. V.; Carels, C.; Carlsmith, D. L.; Carmona-Benitez, M. C.; Cascella, M.; Chan, C.; Cole, A.; Cutter, J. E.; Dobson, J. E. Y.; Druszkiewicz, E.; Fiorucci, S.; Flaecher, H.; Fruth, T.; Ghag, C.; Gokhale, S.; van der Grinten, M. G. D.; Hall, C. R.; Haselschwardt, S. J.; Hor, J. Y-K.; Horn, M.; Ignarra, C. M.; Jahangir, O.; Ji, W.; Johnson, J.; Kaboth, A. C.; Kamdin, K.; Korley, L.; Korolkova, E. V.; Kraus, H.; Kravitz, S. W.; Kreczko, L.; Krikler, B.; Kudryavtsev, V. A.; Lesko, K. T.; Levy, C.; Liao, J.; Lindote, A.; Liu, R.; Liu, X.; López Paredes, B.; Lorenzon, W.; Luitz, S.; Lyle, J. M.; Manenti, L.; Mannino, R. L.; Marangou, N.; Marzioni, M. F.; McKinsey, D. N.; McLaughlin, J.; Meng, Y.; Morad, J. A.; Murphy, A. St. J.; Naim, D.; Naylor, A.; Nedlik, C.; Nikoleyczik, J.; Nilima, A.; Olcina, I.; Oliver-Mallory, K. C.; Pal, S.; Palladino, K. J.; Pereira, G.; Piepke, A.; Pushkin, K.; Reichenbacher, J.; Rhyne, C. A.; Riffard, Q.; Rosero, R.; Rossiter, P.; Sazzad, A. B. M. R.; Schnee, R. W.; Schubnell, M.; Seymour, D.; Shaw, S.; Silk, J. J.; Solmaz, M.; Solovov, V. N.; Sorensen, P.; Stancu, I.; Stiegler, T. M.; Stifter, K.; Szydagis, M.; Taylor, R.; Temples, D.; Tiedt, D. R.; Tomás, A.; Tripathi, M.; Tvrznikova, L.; Vacheret, A.; Webb, R. C.; Wolfs, F. L. H.; Yin, J.

    Astroparticle physics, 03/2020, Letnik: 116, Številka: C
    Journal Article

    Deep underground environments are ideal for low background searches due to the attenuation of cosmic rays by passage through the earth. However, they are affected by backgrounds from γ-rays emitted by 40K and the 238U and 232Th decay chains in the surrounding rock. The LUX-ZEPLIN (LZ) experiment will search for dark matter particle interactions with a liquid xenon TPC located within the Davis campus at the Sanford Underground Research Facility, Lead, South Dakota, at the 4850-foot level. In order to characterise the cavern background, in-situ γ-ray measurements were taken with a sodium iodide detector in various locations and with lead shielding. The integral count rates (0–3300 keV) varied from 596 Hz to 1355 Hz for unshielded measurements, corresponding to a total flux from the cavern walls of 1.9±0.4 $γ$ cm-2s-1. The resulting activity in the walls of the cavern can be characterised as 220±60 Bq/kg of 40K, 29±15 Bq/kg of 238U, and 13±3 Bq/kg of 232Th.